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Author SHA1 Message Date
mstemberaandDisservin eec361f64c Simplify bad quiets 
The main difference is that instead of returning the first bad quiet as
a good one we fall through. This is actually more correct and simpler
to implement.

Non regression STC:
https://tests.stockfishchess.org/tests/view/659bbb3479aa8af82b964ec7
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 150944 W: 38399 L: 38305 D: 74240
Ptnml(0-2): 485, 18042, 38298, 18188, 459

Non regression LTC:
https://tests.stockfishchess.org/tests/view/659c6e6279aa8af82b9660eb
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 192060 W: 47871 L: 47823 D: 96366
Ptnml(0-2): 144, 21912, 51845, 22010, 119

The cutoff is now -8K instead of -7.5K.
-7.5K failed. https://tests.stockfishchess.org/tests/view/659a1f4b79aa8af82b962a0e
This was likely a false negative.

closes https://github.com/official-stockfish/Stockfish/pull/4975

Bench: 1308279
 2024-01-13 19:40:53 +01:00
mstemberaandDisservin a5a76a6370 Introduce BAD_QUIET movepicker stage 
Split quiets into good and bad as we do with captures. When we find
the first quiet move below a certain threshold that has been sorted we
consider all subsequent quiets bad.  Inspired by @locutus2 idea to skip
bad captures.

Passed STC:
https://tests.stockfishchess.org/tests/view/6597759f79aa8af82b95fa17
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 138688 W: 35566 L: 35096 D: 68026
Ptnml(0-2): 476, 16367, 35183, 16847, 471

Passed LTC:
https://tests.stockfishchess.org/tests/view/6598583c79aa8af82b960ad0
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 84108 W: 21468 L: 21048 D: 41592
Ptnml(0-2): 38, 9355, 22858, 9755, 48

closes https://github.com/official-stockfish/Stockfish/pull/4970

Bench: 1336907
 2024-01-07 13:41:50 +01:00
mstemberaandJoost VandeVondele 8366ec48ae Scale down stat bonus 
STC https://tests.stockfishchess.org/tests/view/652eff58de6d262d08d33353
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 88224 W: 22618 L: 22228 D: 43378
Ptnml(0-2): 282, 10177, 22783, 10609, 261

LTC https://tests.stockfishchess.org/tests/view/652fd13bde6d262d08d3481a
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 143508 W: 36674 L: 36142 D: 70692
Ptnml(0-2): 92, 15240, 40534, 15820, 68

Reduces the stat bonus by 20%. Maybe future patches can tune the actual bonus calculations for different histories.

closes https://github.com/official-stockfish/Stockfish/pull/4836

bench: 1185932
 2023-10-21 10:37:27 +02:00
mstemberaandJoost VandeVondele d3d0c69dc1 Remove outdated Tile naming. 
cleanup variable naming after  #4816

closes #4833

No functional change
 2023-10-21 10:28:55 +02:00
mstemberaandJoost VandeVondele c17a657b04 Optimize the most common update accumalator cases w/o tiling 
In the most common case where we only update a single state
it's faster to not use temporary accumulation registers and tiling.
(Also includes a couple of small cleanups.)

passed STC
https://tests.stockfishchess.org/tests/view/651918e3cff46e538ee0023b
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 34944 W: 8989 L: 8687 D: 17268
Ptnml(0-2): 88, 3743, 9512, 4037, 92

A simpler version
https://tests.stockfishchess.org/tests/view/65190dfacff46e538ee00155
also passed but this version is stronger still
https://tests.stockfishchess.org/tests/view/6519b95fcff46e538ee00fa2

closes https://github.com/official-stockfish/Stockfish/pull/4816

No functional change
 2023-10-08 07:42:39 +02:00
mstemberaandMarco Costalba 4a7b8180ec Remove per thread instances of Endgames. (#2056) 
Similar to PSQT we only need one instance of the Endgames resource. The current per thread copies are identical and read only(after initialization) so from a design point of view it doesn't make sense to have them.

Tested for no slowdown.
http://tests.stockfishchess.org/tests/view/5c94377a0ebc5925cfff43ca
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17320 W: 3487 L: 3359 D: 10474

No functional change.
 2019-05-15 10:41:58 +02:00
mstemberaandMarco Costalba 6514500236 Less king danger if we have a knight near by to defend it. (#1987) 
bench: 3653942
 2019-02-03 14:16:34 +01:00
mstemberaandMarco Costalba 656aad8b0c Use a bit less code to calculate hashfull() (#1830) 
* Use a bit less code to calculate hashfull(). Change post increment to preincrement as is more standard
in the rest of stockfish.  Scale result so we report 100% instead of 99.9% when completely full.

No functional change.
 2018-12-23 16:10:07 +01:00
mstemberaandMarco Costalba ae5d2c38e1 Turn on random access for Syzygy files in Windows (#1840) 
* This is the Windows version of
https://github.com/official-stockfish/Stockfish/pull/1829

No functional change.
 2018-12-23 16:09:03 +01:00
mstemberaandMarco Costalba 378c8bdbb8 Stockfish 9 
Official release version of Stockfish 9

Bench 5023629
 2018-01-31 11:41:09 +01:00